Gregory House (Hugh Laurie)

Adam Taylor / Fox

Show: "House" Vice: Vicodin Low point: After many seasons of denying that his Vicodin use interfered with his medical practice, House realized he was seeing hallucinations and committed himself to a psychiatric hospital.

Show: "House" Vice: Vicodin Low point: After many seasons of denying that his Vicodin use interfered with his medical practice, House realized he was seeing hallucinations and committed himself to a psychiatric hospital. (Adam Taylor / Fox)

Show: "House" Vice: Vicodin Low point: After many seasons of denying that his Vicodin use interfered with his medical practice, House realized he was seeing hallucinations and committed himself to a psychiatric hospital.